Soccer Football - Manchester United Training - Manchester, Britain - September 11, 2017 Manchester United manager Jose Mourinho during training Action Images via Reuters/Jason Cairnduff
(Reuters) - Manchester United are back in their "natural habitat" in the Champions League and are up for the challenge of playing against the best teams in Europe, manager Jose Mourinho said.
United had failed to qualify for the Champions League for Mourinho's debut campaign but their Europa League triumph last season secured a return to Europe's elite competition.
